/Engine/Source/Runtime/Engine/Classes/Animation/AttributesContainer.h
Removes all, if existing, an attribute type/value entries for the specified InScriptType.
Whether or not the removal was succesful
bool RemoveAll ( const [UScriptStruct](API\Runtime\CoreUObject\UObject\UScriptStruct) * InScriptStruct, const [FAttributeId](API\Runtime\Engine\Animation\FAttributeId) & InAttributeId )